I can post some pics but here are my cases and impressions.
Bought an Apple leather in black initially as a holdover. Nice case. I like how it is minimalistic. But I like a case that slides better and this doesn't move in and out of your pocket easily enough. The leather also makes it a bit thicker, which on a 6 Plus, increases the width and hand fatigue/hand cramp.
Also have the Spigen iPhone Case 6 Plus Thin (Amazon calls it "Thin Perfect Fit") which was $7.99 in clear and has almost the same exact cut as the leather case but is slick and a tiny bit slimmer. This is what I am going to use going forward and am very happy with. It reveals all the bottom ports well and gives protection without being too bulky.
I was going to order the Spigen Air Skin but I do like the clear vs. the Air Skin "soft" color which isn't quite transparent. The Air Skin wasn't available yet when I ordered.
I also got the Spigen Air Cushion in clear that someone else posted shots of. I don't think I can send it back. I see the appeal that it gives a bit more coverage than mine, but it is a soft plastic (in order to wrap onto the bezel) and I think those like the Apple silicone cases don't slide into a pocket as easily. I also don't like how they ports on the bottom are more covered. I use a Belkin dock on my nightstand and a JBL speaker in the bathroom that I can dock my 6 Plus on with either the Apple leather or Spigen Thin Fit on without removing. I wouldn't be able to do that with the Air Cushion.
All that said I have always kept my iPhone, iPhone 3G, iPhone 4, and iPhone 5 all without cases save for using the Apple Bumper for a short time. I like the naked feel. But with the 6 Plus size, not wanting to scratch it, possible but proven not to worry bend issues, etc. I decided to use a case with the 6 Plus short term at least. I used skins on my original iPhone, 3G, and 4 but not on my 5. And my 2 year old 5 is in mint condition, not one scratch. I would have considered putting a skin on the 6 Plus, but because of the new curved sides, most skins will wrap to the glass seam. And in my experience from the original/3G days, the edges of those skins peel back and get pocket lint under them. Because the 4 and 5 was a flat back they didn't suffer this problem. So I plan to skip the skin option.